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arXiv · 2603.18552

On the origin of non-Arrhenius behavior of grain growth

Xinlei Pan·Jingyu Li·Jianfeng Hu
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Abstract

Non-Arrhenius grain growth has been observed in a range of polycrystalline materials; however, its fundamental mechanisms, particularly whether the process is thermally activated or exhibits anti-thermally activation, remain controversial. In this study, SrTiO3 was employed as a model system to systematically investigate non-Arrhenius grain growth behavior through combined experimental and theoretical approaches, utilizing a newly developed grain growth model. The results reveal that non-Arrhenius grain growth is a thermally activated process without a definitive characteristic temperature, which is primarily controlled by the interplay between temperature-dependent factors and the temperature-independent parameters such as grain size and its distribution. Moreover, during abnormal grain growth (AGG), the non-Arrhenius behavior of grain growth primarily occurs at lower temperatures and gradually transitions to Arrhenius-type behavior as the temperature increases.

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Xinlei Pan, Jingyu Li, Jianfeng Hu. 2026-03-19. On the origin of non-Arrhenius behavior of grain growth. https://arxiv.org/abs/2603.18552

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